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                                <h1 id="date&#x83B7;&#x53D6;">Date&#x83B7;&#x53D6;</h1>
<ul>
<li>new Date(string)  string&#x9ED8;&#x8BA4;&#x4E0D;&#x586B;&#x8868;&#x793A;&#x5F53;&#x524D;&#x65F6;&#x95F4;</li>
<li>string &#x53EF;&#x4EE5;&#x5199;&#x6210;&quot;2018/11/11 0:0:0&quot;(&#x5F53;&#x524D;&#x65F6;&#x533A;)</li>
<li>string &#x4E3A;null &#x6807;&#x51C6;&#x65F6;&#x95F4;&#x4E3A;1970&#x5E74;1&#x6708;1&#x65E5; 0:0:0</li>
</ul>
<pre><code class="lang-js">    <span class="hljs-comment">// &#x521B;&#x5EFA;&#x65F6;&#x95F4;&#x5BF9;&#x8C61;</span>
    <span class="hljs-keyword">var</span> d = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>();
    <span class="hljs-comment">// &#x65F6;&#x95F4;&#x6233;  &#x8BA1;&#x7B97;&#x79BB;1970&#x5E74;&#x7684;&#x6BEB;&#x79D2;&#x6570;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x5F53;&#x524D;&#x65F6;&#x95F4;&#x6233;&quot;</span>,d);
    <span class="hljs-comment">// &#x6765;&#x81EA;&#x670D;&#x52A1;&#x5668;&#x7684;&#x65F6;&#x95F4;&#x6233; &#x548C;  &#x672C;&#x5730;&#x7684;&#x65F6;&#x95F4;&#x6233;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x8DDD;&#x79BB;1970&#x5E74;&#x7684;&#x6BEB;&#x79D2;&#x6570;&quot;</span>,d.getTime());

    <span class="hljs-comment">// &#x5E74;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x5E74;&#x4EFD;&#xFF1A;&quot;</span>,d.getFullYear() );
    <span class="hljs-comment">// &#x6708;   &#x4ECE;0&#x5F00;&#x59CB;&#x6570;&#xFF0C;&#x8BB0;&#x5F97;&#x6708;&#x4EFD;+1</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x6708;&#x4EFD;&#xFF1A;&quot;</span>,d.getMonth()+<span class="hljs-number">1</span> );
    <span class="hljs-comment">// &#x65E5;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x65E5;&#x4EFD;&quot;</span>,d.getDate())
    <span class="hljs-comment">// &#x661F;&#x671F;  &#x65E5;&#x5386;&#x661F;&#x671F;&#x51E0;&#xFF0C;&#x4ECE;&#x5468;&#x65E5;&#xFF08;0&#xFF09;&#x5F00;&#x59CB;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x661F;&#x671F;&quot;</span>,d.getDay())

    <span class="hljs-comment">// &#x65F6;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x65F6;&quot;</span>,d.getHours())
    <span class="hljs-comment">// &#x5206;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x5206;&quot;</span>,d.getMinutes())
    <span class="hljs-comment">// &#x79D2;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x79D2;&quot;</span>,d.getSeconds())
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x6BEB;&#x79D2;&quot;</span>,d.getMilliseconds())
</code></pre>
<p>&#x7EC3;&#x4E60;&#xFF1A;&#x53CC;&#x5341;&#x4E00;&#x5012;&#x8BA1;&#x65F6;&#xFF08;&#x65F6;&#xFF1A;&#x5206;&#xFF1A;&#x79D2;&#xFF09;    </p>
<pre><code class="lang-js">    <span class="hljs-comment">//&#x5F53;&#x524D;&#x65F6;&#x95F4;</span>
    <span class="hljs-keyword">var</span> d = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>();  
    <span class="hljs-comment">//&#x53CC;&#x5341;&#x4E00;&#x65F6;&#x95F4;</span>
    <span class="hljs-keyword">var</span> day11 = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>(<span class="hljs-string">&quot;2018-11-11 0:0:0&quot;</span>)  
    <span class="hljs-keyword">var</span> dayCha = day11 - d;
    <span class="hljs-comment">//&#x76F8;&#x5DEE;&#x7684;&#x6BEB;&#x79D2;&#x6570;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x8DDD;&#x79BB;&#x53CC;&#x5341;&#x4E00;&#x7684;&#x6BEB;&#x79D2;&#x6570;&quot;</span>,dayCha)   
    <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">countDown</span>(<span class="hljs-params">time</span>)</span>{
        <span class="hljs-keyword">var</span> day = <span class="hljs-built_in">parseInt</span>(time/(<span class="hljs-number">24</span>*<span class="hljs-number">60</span>*<span class="hljs-number">60</span>*<span class="hljs-number">1000</span>))<span class="hljs-comment">//&#x5929;</span>
        <span class="hljs-keyword">var</span> hour = <span class="hljs-built_in">parseInt</span>(time%(<span class="hljs-number">24</span>*<span class="hljs-number">60</span>*<span class="hljs-number">60</span>*<span class="hljs-number">1000</span>)/(<span class="hljs-number">60</span>*<span class="hljs-number">60</span>*<span class="hljs-number">1000</span>));<span class="hljs-comment">//&#x5C0F;&#x65F6;</span>
        <span class="hljs-keyword">var</span> minute = <span class="hljs-built_in">parseInt</span>(time%(<span class="hljs-number">60</span>*<span class="hljs-number">60</span>*<span class="hljs-number">1000</span>)/(<span class="hljs-number">60</span>*<span class="hljs-number">1000</span>)) ; <span class="hljs-comment">//&#x5206;</span>
        <span class="hljs-keyword">var</span> second = <span class="hljs-built_in">parseInt</span>(time%(<span class="hljs-number">60</span>*<span class="hljs-number">1000</span>)/<span class="hljs-number">1000</span>) ;<span class="hljs-comment">//&#x79D2;</span>
        <span class="hljs-keyword">if</span>(hour&lt;<span class="hljs-number">10</span>){
            hour = <span class="hljs-string">&quot;0&quot;</span>+hour;
        }
        <span class="hljs-keyword">if</span>(minute&lt;<span class="hljs-number">10</span>){
            minute = <span class="hljs-string">&quot;0&quot;</span>+minute;
        }
        <span class="hljs-keyword">if</span>(second&lt;<span class="hljs-number">10</span>){
            second = <span class="hljs-string">&quot;0&quot;</span>+second;
        }

        <span class="hljs-comment">//document.writeln(day+&quot;&#x5929;&quot;+hour+&quot;&#x65F6;&quot;+minute+&quot;&#x5206;&quot;+second+&quot;&#x79D2;&quot;);</span>
        <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&quot;day&quot;</span>).innerHTML= day+<span class="hljs-string">&quot;&#x5929;&quot;</span>;
        <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&quot;hour&quot;</span>).innerHTML= hour+<span class="hljs-string">&quot;&#xFF1A;&quot;</span>;
        <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&quot;minute&quot;</span>).innerHTML= minute+<span class="hljs-string">&quot;&#xFF1A;&quot;</span>;
        <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&quot;second&quot;</span>).innerHTML= second;
    }
    <span class="hljs-comment">// &#x8BA1;&#x65F6;&#x5668;</span>
    <span class="hljs-keyword">var</span> t = setInterval(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>)</span>{
        dayCha -=<span class="hljs-number">1000</span>; 
        countDown(dayCha)
    },<span class="hljs-number">1000</span>)
</code></pre>

                                
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